check cached dataset RSS

• • Reply
  

  priya_amb

  Member

  145 Points

  29 Posts

  check cached dataset

  Apr 09, 2004 10:38 AM|LINK

  I have a dataset Cache("Data") = DataSet11 how do i check if cache has data or not? say if cache("Data")=nothing then....? but this throws exception System.InvalidCastException: Operator is not valid for type 'DataSet' and 'Nothing'. at Microsoft.VisualBasic.CompilerServices.ObjectType.ThrowNoValidOperator(Object obj1, Object obj2) at Microsoft.VisualBasic.CompilerServices.ObjectType.ObjTst(Object o1, Object o2, Boolean TextCompare) how do i check else??
  Priya
• • Reply
  

  joteke

  All-Star

  46284 Points

  6896 Posts

  ASPInsiders

  MVP

  Re: check cached dataset

  Apr 09, 2004 11:15 AM|LINK

  If Cache("Data") Is Nothing Then
    'Nothing there
  Else
     'Something there
  End If

  Thanks,
  
  Teemu Keiski
  Finland, EU
  
• • Reply
  

  gooberdlx

  Member

  265 Points

  53 Posts

  Re: check cached dataset

  Apr 09, 2004 02:53 PM|LINK

  or in C#, I usually grab the cache data first, then check.. so you don't have to access the cache again to use the values ALWAYS CHECK THE CACHE! DataSet myDataSet = Cache["Data"]; if (myDataSet == null) // You have to use DOUBLE = , which is the equals to operator.. { // process myDataSet } else { // populate myDataSet manually // Cache["Data"] = myDataSet; }
  :::: without RAM i am nothing ::::